#210: Add 'show' command

CHANGELOG.md

@@ -1,3 +1,8 @@
+## Unreleased
+
+* Added:
+  * CLI: `show` command to print the version without changing any files.
+
 ## v1.5.2 (2025-01-09)
 
 * Fixed:

poetry_dynamic_versioning/__main__.py

@@ -15,6 +15,8 @@ def main() -> None:
             cli.apply(standalone=True)
         elif args.cmd == cli.Command.enable:
             cli.enable()
+        elif args.cmd == cli.Command.show:
+            cli.show()
     except Exception as e:
         print("Error: {}".format(e), file=sys.stderr)
         sys.exit(1)

poetry_dynamic_versioning/cli.py

@@ -9,7 +9,9 @@
 
 from poetry_dynamic_versioning import (
     _get_and_apply_version,
+    _get_config,
     _get_pyproject_path,
+    _get_version,
     _state,
     _validate_config,
 )
@@ -34,7 +36,9 @@ class Key:
 class Command:
     dv = "dynamic-versioning"
     enable = "enable"
+    show = "show"
     dv_enable = "{} {}".format(dv, enable)
+    dv_show = "{} {}".format(dv, show)
 
 
 class Help:
@@ -47,13 +51,15 @@ class Help:
         "Update pyproject.toml to enable the plugin using a typical configuration."
         " The output may not be suitable for more complex use cases."
     )
+    show = "Print the version without changing any files."
 
 
 def get_parser() -> argparse.ArgumentParser:
     parser = argparse.ArgumentParser(description=Help.main)
 
     subparsers = parser.add_subparsers(dest="cmd", title="subcommands")
     subparsers.add_parser(Command.enable, help=Help.enable)
+    subparsers.add_parser(Command.show, help=Help.show)
 
     return parser
 
@@ -140,3 +146,15 @@ def _enable_in_doc(doc: tomlkit.TOMLDocument) -> tomlkit.TOMLDocument:
             doc[Key.tool][Key.poetry][Key.version] = "0.0.0"
 
     return doc
+
+
+def show() -> None:
+    pyproject_path = _get_pyproject_path()
+    if pyproject_path is None:
+        raise RuntimeError("Unable to find pyproject.toml")
+
+    pyproject = tomlkit.parse(pyproject_path.read_bytes().decode("utf-8"))
+    config = _get_config(pyproject)
+    version = _get_version(config)
+
+    print(version[0])

poetry_dynamic_versioning/plugin.py

@@ -61,7 +61,7 @@ def _should_apply(command: str) -> bool:
     if override is not None:
         return command in override.split(",")
     else:
-        return command not in ["run", "shell", cli.Command.dv, cli.Command.dv_enable]
+        return command not in ["run", "shell", cli.Command.dv, cli.Command.dv_enable, cli.Command.dv_show]
 
 
 def _should_apply_with_io(command: str) -> bool:
@@ -127,6 +127,20 @@ def handle(self) -> int:
         return 0
 
 
+class DynamicVersioningShowCommand(Command):
+    name = cli.Command.dv_show
+    description = cli.Help.show
+
+    def __init__(self, application: Application):
+        super().__init__()
+        self._application = application
+
+    def handle(self) -> int:
+        _state.cli_mode = True
+        cli.show()
+        return 0
+
+
 class DynamicVersioningPlugin(ApplicationPlugin):
     def __init__(self):
         self._application = None
@@ -138,6 +152,9 @@ def activate(self, application: Application) -> None:
         application.command_loader.register_factory(
             cli.Command.dv_enable, lambda: DynamicVersioningEnableCommand(application)
         )
+        application.command_loader.register_factory(
+            cli.Command.dv_show, lambda: DynamicVersioningShowCommand(application)
+        )
 
         try:
             local = self._application.poetry.pyproject.data